JP4560881B2 - Airbag device - Google Patents

Airbag device Download PDF

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Publication number
JP4560881B2
JP4560881B2 JP2000121333A JP2000121333A JP4560881B2 JP 4560881 B2 JP4560881 B2 JP 4560881B2 JP 2000121333 A JP2000121333 A JP 2000121333A JP 2000121333 A JP2000121333 A JP 2000121333A JP 4560881 B2 JP4560881 B2 JP 4560881B2
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Japan
Prior art keywords
airbag
inflator
portion
side
member
Prior art date
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Active
Application number
JP2000121333A
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Japanese (ja)
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JP2001301560A (en
Inventor
忠弘 居川
一朗 雨森
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タカタ株式会社
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Priority to JP2000121333A priority Critical patent/JP4560881B2/en
Publication of JP2001301560A publication Critical patent/JP2001301560A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23Inflatable members
    • B60R21/231Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/216Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member comprising tether means for limitation of cover motion during deployment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R2021/21525Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member the lid being fixed on the bag, or forming part of the bag wall, or the bag itself being used as wall liner
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/203Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to an airbag device, and more particularly to an airbag device suitable for a driver's seat airbag device. More specifically, the present invention relates to an airbag device having an improved inflator mounting structure.
[0002]
[Prior art]
  As is well known, the airbag device for the driver's seat is attached to the center of the steering wheel. When an automobile encounters an emergency such as a collision, the inflator is activated and the airbag is deployed.
[0003]
  This airbag device for a driver's seat is generally composed mainly of a plate-like base member called a retainer, an inflator, an airbag, and a module cover. An inflator insertion port is provided at the center of the retainer, and the leading side of the inflator is inserted into the inflator insertion port.
[0004]
  The inflator is provided with a flange-like attachment piece (hereinafter sometimes simply referred to as a flange) for projecting from the side surface and attaching and fixing the inflator to the retainer.
[0005]
  This flange is in contact with the peripheral edge of the inflator insertion port. The inflator is configured such that a gas generating agent is filled in a casing, the gas generating agent is ignited by an igniter, and gas is ejected from a gas outlet provided on the outer peripheral surface on the tip side of the inflator.
[0006]
  Further, the airbag has an opening at the rear end thereof, and this opening is overlapped with a peripheral portion of the inflator insertion port. A ring-shaped airbag attachment member (hereinafter sometimes simply referred to as “ring”) is disposed so as to press the peripheral portion of the opening, and the ring is fixed by bolts and nuts or rivets. The airbag is fixed to the retainer by sandwiching the periphery of the opening of the airbag between the ring and the periphery of the inflator insertion port of the retainer.
[0007]
[Problems to be solved by the invention]
  In such an airbag device, it is essential that the inflator is provided with a flange (attachment piece) for fixing the inflator to the retainer. However, this flange is usually provided on the side peripheral surface of the inflator by welding or the like, and the work is complicated and the cost is increased. In such an airbag device, an inflator in which this flange is omitted may be used. In this case, a holding part such as a bracket for newly holding the inflator is additionally mounted in place of the flange. Even in this case, as the number of parts increases, the assembly work of the airbag device becomes complicated and the cost increases.
[0008]
  The present invention solves such a conventional problem, and even when an inflator having no attachment piece such as a flange is used, the inflator can be used as a retainer without newly providing a retainer for the retainer. An object of the present invention is to provide an airbag device that can be attached.
[0009]
[Means for Solving the Problems]
  The airbag device of the present invention includes a base member (retainer), an airbag attached to the base member by an airbag attachment member, an inflator that generates gas for inflating the airbag, and the folded airbag. And an inflator having a module cover covering the inflator,Of a substantially cylindrical shape,~ sideZhouDo not have a mounting piece protruding from the surfacePotatoAnd the inflator is connected to the base by the airbag mounting member.ElementFixed againstAn air bag apparatus, wherein the base member is provided with an opening for inserting an inflator, the air bag is disposed on the occupant side of the base member, and an inflator is provided at an end of the air bag opposite to the occupant. A receiving opening is provided, and a peripheral edge portion of the inflator receiving opening is overlapped with a peripheral edge portion of the inflator insertion opening of the base member and fixed by the airbag mounting member. A housing member for housing the inflator protruding to the opposite side is attached to the base member, and the housing member is configured separately from the base member and attached to the base member. The accommodating member includes a substantially cylindrical peripheral wall disposed coaxially with the inflator insertion opening, and extends outward from the end on the passenger side of the peripheral wall. And an outwardly facing hook-like part extending from the side opposite to the occupant of the peripheral wall part to the inside of the peripheral wall part, and the outwardly saddle-like part and the occupant of the base member From the opposite side, the base member is overlaid on the periphery of the inflator insertion opening and fixed to the base member, and the inflator has an axial direction parallel to the axial direction of the inflator insertion opening. Inserted into the inflator insertion opening, the opposite side of the occupant is housed inside the peripheral wall of the housing member, the occupant side is introduced into the airbag through the inflator receiving opening, The occupant side of the inflator is a gas ejection part, and the airbag mounting member has a pressing part that wraps around the occupant side of the inflator and presses the inflator, Membered opposite side is supported by the peripheral wall portion and the inward flange portion of said housing member, by being pressed by the presser portion from the occupant side, and is fixed to the base memberIt is characterized by this.
[0010]
  According to the airbag apparatus of the present invention, even when an inflator having no attachment piece for attaching the inflator to the retainer is used, the inflator is fixed to the retainer together with the airbag by the airbag attachment member. As a result, it is possible to save the trouble of providing a mounting piece such as a flange on the inflator, and it is not necessary to newly provide a holding member for the retainer on the inflator in place of such a mounting piece..
[0011]
  BookInvention airbag deviceThereIs,Airbag is the baseElementofCrewArranged on the side and the baseElementFromOpposite to passengerAnd a housing member for housing the inflator protruding to the baseElementThe airbag attachment member is attached to the inflator.CrewIt has a presser part that goes to the side and holds the inflatorCageThe inflator is housed in the housing member and is fixed to the base by being pressed by the pressing portion.
[0012]
  Configured like thisByAs the retainer of the airbag device of the present invention, a conventional retainer having only an opening for inserting an inflator and not having an inflator accommodating portion can be used. That is, such a conventional retainerOpposite to crewOn the side, a housing member for housing the inflator is attached from the opening, and the retainerCrewOn the side of the inflatorCrew sideBy installing an airbag attachment member having a pressing part that wraps around and holds the inflator, as described above, the inflator without the attachment piece can be firmly fixed to the retainer. Therefore, even when a conventional retainer is used, an inflator that does not have its own attachment piece to the retainer can be firmly attached to the retainer.
[0013]
  The airbag device further includes an inflator.Crew sideFace and module coverCrew sideA switch may be disposed between the switch and the surface portion, and the switch may be supported by the pressing portion of the airbag mounting member.
[0014]
  By configuring in this way, for example, the module cover can beCrew sideThe module cover is made of synthetic resin that can be elastically deformed by pressing the surface part.Crew sideSwitch on the inflator such as a horn switch that operates by pressing the surface part.Crew sideFace and module coverCrew sideIn the case where the switch is disposed between the surface portion, the switch can be supported by the pressing portion of the airbag mounting member, so that the operability of the switch is improved and the operational feeling is also good.
[0015]
  The airbag device of the present invention includes an airbag mounting member and an airbag.Crew sideIt is preferable that the surface portion is connected via a strap. In the airbag apparatus configured as described above, one end of the strap is arranged along the inner peripheral surface of the airbag.Crew sideThe air bag is connected to the surface portion and the other end is connected to the air bag mounting member inside the air bag. When the air bag is inflated by the gas ejected from the inflator, the air bag is a restricting means for restricting the deployed shape of the air bag. .
[0016]
  That is, the strap has a predetermined length, and the airbag connected by the strapCrew sideWhen the airbag is inflated, the surface portion and the airbag mounting member are not separated by a predetermined distance or more by this strap. As a result, in the event of an emergency such as a vehicle collision, if the inflator is insufflated and the airbag is inflated and deployed in the vehicle compartment,Crew sideSince the surface portion does not bulge more than a predetermined amount, the side portion of the airbag is greatly bulged to the outside of the steering by the gas pressure, and the passenger can be sufficiently protected.
[0017]
  The airbag device of the present invention is an airbag.Crew sideA module cover or emblem may be attached to the surface portion, and the module cover or emblem and the airbag attaching member may be connected by a strap.
[0018]
  In this case, for example, the module cover or the emblem is arranged along the outer peripheral surface of the airbag.Crew sideAttached to the surface of the airbagCrew sideThe surface portion is provided with an insertion opening for inserting the strap. The strap is inserted into the insertion opening, one end is coupled to the module cover or the emblem, and the other end is coupled to the airbag mounting member inside the airbag.
[0019]
  When the airbag is inflated in the airbag device configured as described above,Crew sideThe module cover or emblem attached to the surface portion moves toward the occupant side as the airbag is inflated, and after moving a predetermined amount, the movement is stopped by the strap. Thereby, even in the airbag apparatus configured as described above,Crew sideThe bulge of the surface portion is restrained, and the side portion of the airbag is greatly bulged to the outside of the steering by the gas pressure, so that the occupant can be sufficiently protected.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
  Referring to the drawings belowReference examples andEmbodiments of the present invention will be described.
[0021]
  Figure 1Reference exampleFIG. 2 is an exploded perspective view showing the configuration of the main part of the airbag apparatus.
[0022]
  The airbag device 1 includes a plate-like base member (hereinafter, this plate-like base member may be referred to as a “retainer”) 2, an inflator 4, an airbag 6, and the airbag 6 as a retainer. And an airbag attachment member 8 for attachment to the vehicle 2.
[0023]
  The inflator 4 has a flat side surface shape that does not have an attachment piece to a retainer made of a flange or the like protruding from the side surface. The front half side of the inflator 4 (occupant side. Hereinafter, the direction toward the occupant side may be referred to as “front” and the opposite direction may be referred to as “rearward”) in order to inflate the airbag 6. It is a gas ejection part that ejects the gas. Although not shown, the inflator 4 is connected to a control device by a connector or the like, and in an emergency such as a vehicle collision, the inflator 4 is operated to eject gas by an operation signal from the control device to Inflate.
[0024]
  The airbag 6 includes an opening 10 for receiving a gas ejection portion of the inflator 4 at the rear end thereof. This airbag 6 is an airbag for a driver's seat, and is configured by sewing the peripheral portions of a front surface portion (not shown) and a rear surface portion (not shown) each made of a circular cloth. A plurality of insertion holes 12 through which bolts or rivets for attaching the airbag 6 to the retainer 2 are inserted are provided at the peripheral edge of the opening 10 of the airbag 6.
[0025]
  On the front side of the retainer 2, the airbag 6 is overlapped with a peripheral portion of an opening 14 a of an inflator accommodating portion 14, which will be described later, of the retainer 2. An airbag mounting member 8 is arranged so as to press the peripheral edge of the opening 10 along the inner peripheral surface of the airbag 6, and between the airbag mounting member 8 and the peripheral edge of the opening 14 a of the retainer 2. Opening 1 of the airbag 60The air bag 6 is fixed to the retainer 2 by sandwiching the peripheral edge portion of the air bag 6. BookReference exampleIn this case, the airbag attaching member 8 is provided with a male screw portion 8a. The male screw portion 8a is inserted into the insertion hole 12 of the airbag 6 and the insertion hole 16 of the retainer 2 described later, and the nut 8b is tightened into the male screw portion 8a from the rear surface side of the retainer, whereby the airbag mounting member 8 is retained by the retainer 2. It is fixed against.
[0026]
  As shown in FIG. 1, the retainer 2 is provided with a housing portion 14 for housing the rear half side of the inflator 4 that protrudes rearward from the retainer 2. The accommodating portion 14 includes an inflator insertion opening 14a provided in the retainer 2, a substantially cylindrical peripheral wall portion 14b extending from the edge of the opening 14a to the rear of the retainer 2, and the peripheral wall portion 14b. It is comprised from the inward flanged part 14c provided in the rear-end part. The inflator 4 has a lower half side inserted into the accommodating portion 14 through the opening 14a, a peripheral wall portion 14b extending along the side surface of the inflator 4, and an inward flange portion 14c that wraps around the rear surface of the inflator 4. Supported by. At this time, the opening 14d surrounded by the inward flange portion 14c on the rear end side of the accommodating portion 14 can be used as a connector outlet through which the connector connecting the inflator 4 and the inflator control device described above is inserted. Further, an insertion hole 16 through which a bolt, a rivet or the like is inserted is provided in the peripheral portion of the opening 14 a of the retainer 2, similar to the insertion hole 12 of the airbag 6 described above. BookReference exampleThe retainer 2 is formed in a plate shape by a steel plate or the like, and the accommodating portion 14 is formed integrally with the retainer 2 by press molding or the like.
[0027]
  The airbag attachment member 8 includes an opening 18 for inserting an inflator, and has a ring-like appearance that overlaps the peripheral edge of the opening 10 from the inside of the airbag 6. The airbag mounting member 8 presses the peripheral edge of the opening 10 from the inside of the airbag 6, and the peripheral edge of the opening 10 is sandwiched between the airbag mounting member 8 and the peripheral edge of the opening 14 a of the retainer 2. The airbag 6 is fixed to the retainer 2.
[0028]
  As described above, the airbag mounting member 8 is provided with a plurality of male screw portions 8 a extending rearward from the peripheral edge portion of the opening 18, and the airbag mounting member 8 is provided with the opening 10 of the airbag 6. The male screw portion 8a is arranged so as to be inserted into the insertion hole 12 of the airbag and the insertion hole 16 of the retainer 2 when overlapping with the peripheral edge. The nut 8b is fastened to the male screw portion 8a that is inserted into the insertion holes 12 and 16 and protrudes toward the rear surface of the retainer 2, whereby the airbag attachment member 8 and the airbag 6 are firmly fixed to the retainer 2. The
[0029]
  Further, the airbag attachment member 8 has a pressing portion 20 that presses the front surface of the inflator 4 accommodated in the accommodation portion 14 of the retainer 2 when attached to the retainer 2. The presser portion 20 has a substantially cylindrical peripheral wall portion 20a extending forward from the edge portion of the opening 18 and a front end portion of the peripheral wall portion 20a so as to wrap around the front side of the inflator 4 and press the front surface of the inflator 4. And an inward saddle-shaped portion 20b configured as described above. In the inflator 4 accommodated in the accommodating portion 14 of the retainer 2, when the airbag attachment member 8 is attached to the retainer 2, the gas ejection portion on the front half side is inserted into the opening 18 of the airbag attachment member 8. The peripheral wall portion 20a extending along the side surface and the inwardly hooked portion 20b that presses the front surface of the inflator 4 do not come out of the accommodating portion 14. In addition, the gas conduction for introducing the gas ejected from the gas ejection hole 4a into the airbag 6 at a position overlapping with the gas ejection hole 4a disposed on the side surface of the gas ejection part of the inflator 4 is provided in the peripheral wall portion 20a. A mouth 21 is provided.
[0030]
  In configuring the airbag device 1, the airbag 6 is first disposed on the front side of the retainer 2 such that the peripheral edge of the opening 10 at the rear end thereof overlaps the peripheral edge of the opening 14 a of the retainer 2. At this time, the rear half side of the inflator 4 is accommodated in the accommodating portion 14 of the retainer 2, and the gas ejection portion on the front half side of the inflator 4 is introduced into the airbag 6 from the opening 10 of the airbag 6. A connector (not shown) for connecting the inflator 4 and the inflator control device is taken out from the opening 14d at the rear end of the accommodating portion 14.
[0031]
  Next, the airbag attachment member 8 is superimposed on the peripheral edge from the inside of the airbag 6 so as to press the peripheral edge of the opening 10 of the airbag 6. At this time, the gas ejection portion of the inflator 4 is inserted into the opening 18 of the airbag mounting member 8, and the front surface of the inflator 4 is pressed by the pressing portion 20 of the airbag mounting member 8. Further, the male threaded portion 8a of the airbag mounting member 8 is inserted into the insertion holes 12 and 16 of the airbag 6 and the retainer 2, and the nut 8b is tightened from the tip of the male threaded portion 8a projecting to the rear surface side of the retainer 2. Thereby, the airbag 6 and the airbag attachment member 8 are fixed to the retainer 2.
[0032]
  Thereafter, the airbag 6 is folded, and a module cover (not shown) is provided on the front surface thereof, whereby the airbag apparatus 1 is configured.
[0033]
  The airbag device 1 is for a driver's seat of an automobile and is installed on a steering wheel (not shown) of the automobile. In the event of an emergency such as a vehicle collision, the inflator 4 of the airbag device 1 performs gas ejection operation, and the gas from the inflator 4 is introduced into the airbag 6 through the gas conduction port 21 of the airbag mounting member 8. The airbag 6 starts to inflate. And the airbag 6 pushes open the module cover of the front surface, and expand | deploys in a vehicle interior, and protects a passenger | crew.
[0034]
  According to the airbag device 1 configured as described above, the inflator 4 is held by the accommodating portion 14 of the retainer 2 and the presser portion 20 of the airbag attachment member 8.Reference exampleThus, even when the inflator 4 itself is not provided with an attachment piece to the retainer 2, the inflator can be firmly fixed to the retainer without using a holding member for separately fixing the inflator to the retainer. Thus, the configuration and assembly of the airbag apparatus 1 can be simplified and the cost can be reduced.
[0035]
  Note that the aboveReference example, The accommodating portion 14 is configured integrally with the retainer 2,In the present inventionThe housing part 14 is configured separately from the retainer.Have. By configuring in this way, for example, even when a plate-shaped member that does not have an inflator accommodating portion that has been used in a conventional airbag device is used as a retainer, an attachment piece to the retainer is used. The inflator which does not have can be fixed to a retainer. Hereinafter, an embodiment of an airbag apparatus having such a configuration will be described with reference to FIG. FIG. 3 is a cross-sectional view of the main part of the airbag apparatus according to this embodiment.
[0036]
  As shown in FIG. 3, the airbag device 30 includes a plate-like retainer 32 and an inflator housing member 34 configured to be separate from the retainer 32 and for housing the inflator.
[0037]
  The retainer 32 has the same configuration as that of a retainer used in a conventional airbag device, and an opening 36 for inserting an inflator is provided at the center of the retainer 32. Similar to the insertion hole 16 of the retainer 2, an insertion hole 38 (not shown) through which a bolt or a rivet is inserted is provided.
[0038]
  The housing member 34 has an inner diameter that is substantially the same as the opening diameter of the opening 36 of the retainer 32, and has a substantially cylindrical peripheral wall portion 40 into which the rear half of the inflator 4 is inserted, and an outer end portion of the peripheral wall portion 40. An outward flange 42 extending from the rear surface side of the retainer 32 to the peripheral edge of the opening 36 of the retainer 32, and an inward flange extending from the rear end of the peripheral wall 40 to the inside of the peripheral wall 40. It is comprised from the shape part 44. FIG. The housing member 34 is disposed on the rear surface side of the retainer 32 such that the outward flange portion 42 overlaps with the peripheral edge portion of the opening 36 of the retainer 32, and the opening 36 and the peripheral wall portion 40 communicate with each other substantially coaxially. The Further, the outward flange 42 is provided with an insertion hole 46 (not shown) through which a bolt or a rivet is inserted, similar to the insertion hole 38 of the retainer 32, and the accommodating member 34 is inserted through these insertion holes 46. It arrange | positions so that the holes 38 and 46 may overlap. The inflator 4 is inserted into the peripheral wall portion 40 of the storage member 34 from the opening 36 of the retainer 32 with respect to the storage member 34 arranged in this manner, and wraps around the peripheral wall portion 40 and the rear surface of the inflator 4. The inflator 4 is accommodated in the accommodation member 34 by being supported by the extended inward hook-like portion 44. At this time, the opening 48 surrounded by the inward flanged portion 44 at the rear end of the housing member 34 is a connector for inserting a connector (not shown) for connecting the inflator 4 and the inflator control device (not shown). It can be an outlet.
[0039]
  The other structure of this airbag apparatus 30 is the same as that of the above-mentioned airbag apparatus 1, and the same code | symbol has shown the identical part.
[0040]
  In configuring the airbag device 30, as in the airbag device 1 described above, the airbag 6 has a retainer so that the peripheral portion of the opening 10 at the rear end thereof overlaps the peripheral portion of the opening 36 of the retainer 32. 32 on the front side. At this time, the housing member 34 is disposed on the rear surface side of the retainer 32 so that the peripheral edge portion of the opening 36 and the outward flange portion 42 overlap each other, and the opening 36 and the peripheral wall portion 40 communicate with each other coaxially. 4 is accommodated in the accommodating member 34 through the opening 36, and the gas ejection portion on the front half side of the inflator 4 is introduced into the airbag 6 from the opening 10 of the airbag 6.
[0041]
  A connector (not shown) for connecting the inflator 4 and the inflator control device is taken out from the opening 48 at the rear end of the housing member 34.
[0042]
  Next, the airbag attachment member 8 is superimposed on the peripheral edge from the inside of the airbag 6 so as to press the peripheral edge of the opening 10 of the airbag 6. At this time, the gas ejection portion of the inflator 4 is inserted into the opening 18 of the airbag mounting member 8, and the front surface of the inflator 4 is pressed by the pressing portion 20 of the airbag mounting member 8. Further, the male threaded portion 8a of the airbag mounting member 8 is inserted into the insertion holes 12, 38, 46 of the airbag 6, the retainer 32, and the accommodating member 34, and protrudes to the rear surface side of the outward flanged portion 42 of the accommodating member 34. The nut 8b is tightened from the distal end side of the male screw portion 8a. Thereby, the airbag 6, the airbag attachment member 8, and the housing member 34 are fixed to the retainer 32.
[0043]
  Thereafter, the airbag 6 is folded, and a module cover (not shown) is attached so as to cover the folded body of the airbag 6, thereby configuring the airbag device 30.
[0044]
  Even in the airbag device 30 configured as described above, the inflator 4 is held by the housing member 34 attached to the retainer 32 and the pressing portion 20 of the airbag attachment member 8. There is no need to provide a mounting piece to the retainer 32 and it is firmly fixed to the retainer 32. Further, since the retainer and the housing member for the inflator are separated, it is possible to use a retainer that has been used in a conventional airbag device, which is very reasonable.
[0045]
  thisIn the embodiment, the male screw portion is provided on the airbag mounting member, and the male screw portion is inserted into the insertion holes provided in the airbag, the retainer, the housing member and the like, and then the male screw is provided from the rear surface side of the retainer or the housing member. The housing portion is fixed to the retainer by tightening a nut to the portion, but means for fixing the airbag attachment member to the retainer is not limited to this.
[0046]
  For example, as shown in FIGS. 4 to 7, the airbag mounting member is provided with a claw-like portion extending rearward, and the airbag and the retainer are provided with slit-like insertion holes through which the claw-like portion is inserted. The claw-like portion protruding from the rear surface of the retainer may be bent after the claw-like portion is inserted into the insertion holes of the airbag and the retainer, and the airbag attachment member may be fixed to the retainer. As shown in FIG. 8, the air bag mounting member, the air bag, and the retainer are provided with insertion holes through which bolts or rivets are inserted, respectively, and the peripheral portions of the inflator openings of the air bag mounting member, the air bag, and the retainer. So that the airbag mounting member, the airbag and the retainer are integrally fixed by inserting a bolt or a rivet into the insertion hole after overlapping It may form.
[0047]
  In addition, in the airbag device of the present invention, inflator positioning means may be provided to prevent the inflator from rotating improperly or the inflator from shifting from a predetermined position, and the gas provided to the airbag mounting member The shape of the conduction port can also be arbitrarily formed.
[0048]
  Hereinafter, the airbag apparatus having such a configuration will be described with reference to FIGS.
[0049]
  Figure 4AnotherofReference example5 is an exploded perspective view showing the structure of the main part of the airbag apparatus according to FIG. 5, FIG. 5 is a sectional view of the essential part of the airbag apparatus, FIG. 6 is an enlarged sectional view of the VI portion of FIG. 5, and FIG. FIG. 8 is an exploded perspective view showing a modification of the airbag device.HasaAnotherReference exampleFIG. 9 is an exploded perspective view from the rear side of the airbag apparatus showing a modified example of the positioning means of the inflator.
[0050]
  As shown in FIGS. 4-6, the airbag apparatus 40 is provided with the retainer 52, the inflator 54, the airbag 56, and the airbag attachment member 58 similarly to the airbag apparatus 1 mentioned above. 52 has an accommodating portion 60 for accommodating the rear half side of the inflator 54, and the airbag attachment member 58 has a pressing portion 72 that goes around the front side of the inflator 54 and presses the inflator 54.
[0051]
  The inflator 54 itself is similar to the previous embodiment.RetainerIt has a flat side surface shape that does not have an attachment piece or the like to 52. The front half side of the inflator 54 is a gas ejection portion, and a plurality of gas ejection ports 54a are disposed on the side surface. Further, a connector 54b for connecting the inflator 54 and a control device for controlling the inflator 54 is drawn out from the vicinity of the center of the rear surface of the inflator 54.
[0052]
  Near the center of the front surface of the inflator 54, a convex step portion 54c that engages with an inflator positioning opening 72c provided on the front surface of a presser portion 72 of an air bag mounting member 58 described later is provided. The inflator positioning opening 72c has a substantially elongated opening shape, and the convex step portion 54c has a substantially elliptical planar shape that fits tightly into the opening 72c. When the rear half side of the inflator 54 is accommodated in the accommodating portion 60 of the retainer 52 and the pressing portion 72 of the airbag attachment member 58 is disposed on the front half side of the inflator 54 so as to press the front surface of the inflator 54, the inflator 54 The front surface of the presser portion 72 and the front surface of the presser portion 72 overlap each other, and the opening 72c and the convex stepped portion 54c are engaged with each other so as not to rotate or swing. As a result, the inflator 54 does not rotate or deviate from a predetermined position due to vehicle vibration, gas ejection pressure, or the like.
[0053]
  The airbag 56 includes an inflator opening 64 at the rear end portion, and a plurality of slit-shaped insertion holes through which a claw-like portion 58a of an airbag attachment member 58 described later is inserted in a peripheral portion of the opening 64. 66 is provided. The peripheral edge portion of the opening 64 is overlapped with the peripheral edge portion of the opening 60 a of the accommodating portion 60 of the retainer 52.
[0054]
  The retainer 52 has an inflator accommodating portion 60 in the vicinity of the center thereof, and the structure of the accommodating portion 60 is the same as that of the accommodating portion 14 provided in the retainer 2 of the airbag device 1 described above. An opening 60a for inserting an inflator, a substantially cylindrical peripheral wall portion 60b extending from the edge of the opening 60a to the rear of the retainer 52, and an inwardly hooked portion provided at the rear end portion of the peripheral wall portion 60b 60c.
[0055]
  The inflator 54 is inserted into the housing portion 60 from the opening 60a with respect to the housing portion 60, and a peripheral wall portion 60b extending along the side surface of the inflator 64 and an inner surface that wraps around the rear surface of the inflator 54. It is supported by the facing hook 60c. At this time, the connector 54b for connecting the inflator 54 and the inflator control device for controlling the inflator 54 is taken out from the opening 60d surrounded by the inwardly hooked portion 60c at the rear end of the housing portion 60. .
[0056]
  Further, a slit-like insertion hole 68 through which the claw-like portion 58a of the airbag mounting member 58 is inserted is provided on the peripheral edge portion of the opening 60a of the retainer 62, similar to the insertion hole 66 of the airbag 56 described above. Yes. In addition, thisReference exampleIn this case, the retainer 52 is formed in a plate shape by a steel plate or the like, and the accommodating portion 60 is formed integrally with the retainer 52 by press molding or the like.
[0057]
  Airbag mounting member58 has an opening 70 for inserting an inflator, and has a ring-like appearance that overlaps the peripheral edge of the opening 64 from the inside of the airbag 56. The airbag attachment member 58 presses the peripheral edge of the opening 64 from the inside of the airbag 56, and the opening64 is the airbag mounting member5The airbag 56 is fixed to the retainer 52 by being sandwiched between 8 and the peripheral edge of the opening 60 a of the retainer 42.
[0058]
  As described above, the airbag mounting member 58 has an opening extending rearward.7A claw-like portion 58a having a shape cut and raised from the peripheral portion of 0 is provided. When attaching the airbag 56 to the retainer 52, the airbag attaching member 58 is overlapped so as to press the peripheral edge of the opening 64 of the airbag 56, and the claw-like portion 58 a is inserted into each insertion hole of the airbag 56 and the retainer 52. 66 and 68 are inserted. After the claw-like portion 58a is inserted through the insertion holes 66 and 68, as shown in FIG. 6, the tip portion protruding to the rear surface side of the retainer 52 is bent along the rear surface of the retainer 52. The airbag attachment member 58 is fixed to the retainer 52.
[0059]
  Further, the airbag attachment member 58 has a pressing portion 72 that presses the front surface of the inflator 54 accommodated in the accommodation portion 60 of the retainer 52, similarly to the airbag attachment member 8 of the airbag device 1 described above. . The presser portion 72 includes a peripheral wall portion 72a that extends forward from the edge of the inflator opening 70, and an inner portion that wraps around the front side of the inflator 54 from the front end portion of the peripheral wall portion 72a and presses the front surface of the inflator 54. It consists of an orientation hook 72b.
[0060]
  The inflator 54 accommodated in the accommodating portion 60 of the retainer 52 is inserted into the opening 70 of the airbag attachment member 58 at the front half side when the airbag attachment member 58 is attached to the retainer 52. The peripheral wall portion 72 a extending along the side surface and the inwardly hooked portion 72 b that presses the front surface of the inflator 4 do not come out of the housing portion 60.
[0061]
  The peripheral wall portion 72a is provided with a gas passage port 74 having a substantially elongated hole shape that exposes the gas ejection hole 54a at a position overlapping the gas ejection hole 54a disposed on the side surface of the gas ejection portion of the inflator 54. Yes. The gas ejected from the gas ejection hole 54 a is introduced into the airbag 56 through the gas conduction port 74. In addition, an opening 72c surrounded by an inward hooked portion 72b is formed on the front surface of the presser portion 72 of the airbag mounting member 58. The opening 72c has a substantially elongated hole shape, and the inflator 54 is fixed at a predetermined position by the engagement of the opening 72c and the convex step portion 54c of the inflator 54 described above.
[0062]
  In configuring the airbag device 50, first, the airbag 56However, the rear end portion of the opening 64 is disposed on the front surface side of the retainer 52 such that the peripheral portion of the opening 64 overlaps the peripheral portion of the opening 60 a of the retainer 52. At this time, the rear half side of the inflator 54 is accommodated in the accommodating portion 60 of the retainer 52, and the gas ejection portion on the front half side of the inflator 54 is introduced into the airbag 56 from the opening 64 of the airbag 56. The connector 54b pulled out from the rear surface of the inflator 54 is pulled out from the opening 60d at the rear end of the housing portion 60.
[0063]
  Next, the airbag attachment member 58 is superimposed on the peripheral edge from the inside of the airbag 56 so as to press the peripheral edge of the opening 64 of the airbag 56. At this time, the gas ejection portion of the inflator 54 is inserted into the opening 70 of the airbag mounting member 58, the front surface of the inflator 54 is pressed by the pressing portion 72 of the airbag mounting member 58, and the convex step portion 54 c on the front surface of the inflator 54. And the opening 72c of the presser portion 72 are engaged. Further, the claw-shaped portion 58a of the airbag mounting member 58 is inserted into the insertion holes 66 and 68 of the airbag 56 and the retainer 52, and the tip of the claw-shaped portion 58a protruding from the rear surface of the retainer 52 is formed on the rear surface of the retainer. Bend along. Thereby, the airbag 56 and the airbag attachment member 58 are fixed to the retainer 52.
[0064]
  Thereafter, the airbag 56 is folded, and a module cover (not shown) is provided so as to cover the front surface of the folded body of the airbag 56, whereby the airbag device 50 is configured.
[0065]
  Even in the airbag apparatus 50 configured as described above, the airbag mounting member 58 is firmly fixed to the retainer 52. Further, since the convex portion 54c of the inflator 54 and the opening 72c of the presser portion 72 are engaged with each other on the front surface of the inflator 54, the inflator 54 rotates or deviates due to vehicle vibration, gas ejection pressure, or the like. The inflator 54 can be securely fixed at a predetermined position.
[0066]
  In addition, thisReference exampleThe fixing means of the airbag mounting member 58 to the retainer 52 is provided with a claw-shaped portion 58a that is cut and raised from the peripheral edge of the opening 70 on the airbag mounting member 58, and each insertion of the airbag 56 and the retainer 52 is performed. After inserting the holes 66 and 68, the tip of the claw-like portion 58a protruding from the rear surface of the retainer 52 is bent along the rear surface of the retainer 52. The fixing means for fixing the airbag mounting member to the retainer is this. It is not limited to.
[0067]
  For example, as shown in FIG. 7, the claw-like portion 58a may have a shape in which a protruding piece extending from the outer edge portion of the airbag mounting member 58 is bent backward from the base end portion. Alternatively, as shown in FIG. 8, the insertion holes 66 and 68 are circular holes into which bolts, rivets or the like are inserted, and the airbag 56 or the retainer is provided at the peripheral edge of the opening 70 of the airbag mounting member 58. The insertion holes 58b through which bolts, rivets or the like are inserted are provided in the same manner as the insertion holes 66, 68 of the 52, and the peripheral portions of the inflator openings of the retainer 52, the airbag 56, and the airbag attachment member 58 are overlapped. The retainer 52, the air bag 56, and the air bag mounting member 58 are integrally coupled by bolts, nuts, rivets or the like through the series of insertion holes 58b, 66, and 68. Good.
[0068]
  Inflator positioning meansReference exampleIt is not restricted to the structure of.
[0069]
  For example, in FIG.5A pair of small protrusions 54d is provided on the front surface of the holding member 4, and an engagement hole 72d is provided on the front surface of the holding portion 72 for engaging the small protrusion 54d and fixing the inflator 54 at a predetermined position. Yes. Further, in FIG. 8, a convex strip 54 e having a substantially half-cylinder shape is provided on the front surface of the inflator 54, and the front surface of the presser portion 72 extends forward from the front surface of the presser portion 72. A bulging portion 72e having a substantially inverted U-shaped cross-sectional shape bulging out is provided. By engaging the protruding portion 54e with the bulging portion 72e, the inflator54 is fixed in place.
[0070]
  Further, the positioning means for the inflator may be provided on the rear surface side of the inflator. For example, the inflator 80 shown in FIG. 9 is accommodated in the inflator accommodating portion 84 of the retainer 82 at the rear half. In the vicinity of the center of the rear surface of the housing portion 84, a substantially elongated hole-shaped opening 84a is formed. On the rear surface of the inflator 80, a convex step 80a having a substantially oval planar shape capable of being closely engaged with the opening 84a is provided. The connector 80b is pulled out from the vicinity of the center of the top surface of the convex step 80a.
[0071]
  When the inflator 80 is installed in the retainer 82, first, the latter half of the inflator 80 is accommodated in the accommodating portion 84 of the retainer 82. At this time, the connector 80b of the inflator 80 is inserted into the opening 84a at the rear of the housing portion 84, and the convex step portion 80a is engaged with the opening 84a. Next, an airbag attachment member 85 having a pressing portion 88 that goes around the front side of the inflator 80 and presses the front side of the inflator is installed on the front side of the retainer 82 and the inflator 80. As a result, the inflator 80 is held by the accommodating portion 84 and the holding portion 88 and the convex step portion 80a is engaged with the opening 84a so as not to be able to rotate and swing, so that the inflator 80 is firmly fixed to the retainer 82.
[0072]
  In the airbag apparatus of the present invention, a switch such as a horn switch may be disposed between the front surface of the inflator and the module cover. At this time, this switch can be configured to be supported by the inflator and the presser portion of the airbag attachment member that wraps around the front side of the inflator. Hereinafter, the airbag device configured as described above will be described with reference to FIG. Figure 10 shows thisReference exampleIt is sectional drawing which shows the structure of the airbag apparatus which concerns on this.
[0073]
  BookReference exampleThe airbag device 90 includes a retainer 92, an inflator 94, an airbag 96, and an airbag attachment member 98. The retainer 92 includes an inflator.94, the airbag mounting member 98 includes a pressing portion 102 that goes around the front surface of the inflator 94 and presses the front surface of the inflator 94. The inflator 94 has a flat side surface shape that does not have an attachment piece to the retainer 92.Containment100 and the front surface of the retainer 92 is fixed to the retainer 92 by being pressed by the pressing portion 102.
[0074]
  The airbag 96 has an inflator opening 104 at the rear end. The front half side of the inflator 94 is inserted into the airbag 96 from the opening 104, and the peripheral edge portion of the opening 104 is overlapped with the peripheral edge portion of the opening 100 a of the housing portion 100 on the front surface side of the retainer 92. An airbag mounting member 98 is disposed along the inner peripheral surface of the airbag 96 so as to press the peripheral edge portion of the opening 104 of the airbag 96, and the airbag 96 has a peripheral edge of the openings 100 a of the retainers 92. The peripheral portion of the opening 104 is sandwiched between the airbag mounting member 98 and the airbag mounting member 98 so as to be fixed to the retainer 92. The airbag attachment member 98 has a male threaded portion 98a extending rearward. The male threaded portion 98a is inserted into an insertion hole (not shown) provided in the airbag 96 and the retainer 92, and the retainer 92 The nut 98b is fastened from the front end side of the male screw portion 98a protruding to the rear surface side, and is fixed to the retainer 92.
[0075]
  A horn switch 108 is disposed on the front surface of the inflator 94. The horn switch 108 includes a switch body 108a installed on the front surface of the inflator 94, a flange portion 108b extending from the bottom of the switch body 108a along the front surface of the inflator 94, and a tip portion extending from the front surface of the switch body 108a. And a protruding pin 108c. The pin 108c is inserted so as to be slidable in the front-rear direction with respect to a pin insertion portion (not shown) of the switch body 108a and not removable from the pin insertion portion, and biasing means such as a spring (not shown). Is always biased forward. The horn switch 108 is configured such that when a tip end of a pin 108c is pushed into the horn switch 108a, the horn switch 108 is turned on, and an automobile horn (warf) (not shown) sounds. Of course, when the pushing force to the pin 108c is released, the pin 108c is returned to the original state (the state in which the tip of the pin 108a protrudes from the switch body 108a) by the above-described urging means, and the switch is turned off. The horn stops ringing.
[0076]
  The horn switch 108 is supported on the front surface of the inflator 94 by holding the upper surface of the horn switch 108 b by the switch support portion 102 a extending from the holding portion 102 of the housing portion 98.
[0077]
  The airbag 96 has a front surface portion 96 a covering the front surfaces of the horn switch 108, the inflator 94, and the like, and both side portions thereof are folded in a fold shape so as to be disposed on both sides of the inflator 94. Further, a module cover 106 is installed so as to cover the airbag 96.
[0078]
  The module cover 106 is made of synthetic resin or the like, and can be elastically deformed by the passenger pressing the front surface portion. The module cover 106 and the horn switch 108 are configured such that the rear surface of the module cover 106 and the tip of the pin 108c of the horn switch 108 are arranged close to each other. By pressing, the rear surface of the module cover 106 and the tip of the pin 108c come into contact with each other through the front surface of the airbag 96, the tip of the pin 108c is pushed into the switch body 108a, the switch is turned on, and the horn sounds. It has become a thing.
[0079]
  The airbag device 90 is, RealSimilarly to the airbag device of the embodiment, the inflator 94 is installed on a steering wheel (not shown) of an automobile, and the inflator 94 performs gas ejection operation in the event of an emergency such as a vehicle collision, and the gas provided on the side surface of the airbag mounting member 98 When the gas is introduced into the airbag 96 through the conduction port 98c, the airbag starts to inflate. At this time, since the horn switch 108 is firmly fixed to the front surface of the inflator 94 by the support portion 102a, the horn switch 108 does not come off due to gas pressure from the inflator 94 or the like. Since the airbag 96 is not prevented from being pushed open by the airbag 96, the airbag 96 is deployed in the vehicle compartment without any support even in the airbag apparatus 90 configured as described above.
[0080]
  Further, in the airbag device 90 configured as described above, the switch such as the horn switch 108 is supported by the support portion 102a provided on the airbag mounting member 102 on the front surface of the inflator 94. As described above, even when the front side of the module cover 106 is pressed to operate the switch, the switch body is firmly fixed to the inflator 94, and excellent operability can be obtained.
[0081]
  In addition, thisReference exampleThe horn switch has a pin protruding from the front surface of the switch body, and the horn switch is turned on by pushing the tip of the pin, so that the occupant presses the front surface of the module cover. However, the configuration of the switch and the module cover is not limited to this. For example, the airbag device 90 is configured as shown in FIG. In addition, a horn switch 110 configured so that the tip of a pin (not shown) is substantially flush with the upper surface of the switch body 110a may be provided.
[0082]
  The horn switch 110 extends from the bottom of the switch main body 110a along the front surface of the inflator 94 and is supported by the support portion 102a of the airbag mounting member 98. The flange 110b and the pin insertion portion (not shown) provided from the upper surface of the switch body 110a are inserted so as to be slidable in the front-rear direction and not removable from the pin insertion portion. A pin (not shown) is always urged forward by the urging means, and the tip end surface of this pin and the upper surface of the switch body 110a are substantially flush with each other. By pushing this pin into the switch body 110a, the horn of the automobile starts to sound.
[0083]
  When the horn switch 110 is provided, the module cover 106 of the airbag device 90 is provided with a projection 112 at a position facing the tip end surface of the pin on the rear surface of the module cover 106. The protrusion 112 is close to the front end surface of the pin, and when the occupant presses the front surface of the module cover 106, the protrusion 112 is connected to the front end portion of the air bag 96 on the front end portion of the pin. Then, the horn is switched on by pressing the pin into the switch body 110a.
[0084]
  Even in such a configuration, the horn switch 110 is supported by the support portion 102a provided on the airbag mounting member 102 on the front surface of the inflator 46, so that the switch is operated as described above. Therefore, even when the front side of the module cover 106 is pressed, the switch body is firmly fixed to the inflator 94, and the operability of the switch is excellent.
[0085]
  Next, refer to FIGS. 12-18 and 23.AnotherofAccording to reference examplesThe airbag device will be described. Figure 12AnotherofReference exampleFIG. 13 is a perspective view of the front portion of the airbag of the airbag device, and FIG. 14 is a connection portion of the presser portion of the airbag mounting member and the strap. FIG. 15 is a sectional view showing a modification of the airbag device, FIG. 16 is a perspective view of the front portion of the airbag of the airbag device of FIG. 15, and FIG. 17 is the airbag of FIG. FIG. 18 is a perspective view from the rear surface of the module cover of the airbag device of FIG. 15.
[0086]
  BookReference exampleThe airbag device 120 includes a retainer 122, an inflator 124, an airbag 126, and an airbag attachment member 128. The retainer 122 has a housing portion 130 for housing the rear half of the inflator 124. The airbag attachment member 128 includes a pressing portion 132 that goes around the front surface of the inflator 124 and presses the front surface of the inflator 124. The inflator 124 itself has a flat side surface shape that does not have an attachment piece to the retainer 122. The inflator 124 is fixed to the retainer 122 by being accommodated in the accommodating portion 130 at the rear half and being pressed by the pressing portion 132. Has been.
[0087]
  The airbag 126 has an inflator opening 134 at the rear end. The front half side of the inflator 124 is inserted into the airbag 126 from the opening 134, and the peripheral edge portion of the opening 134 is overlapped with the peripheral edge portion of the opening 130 a of the housing portion 130 on the front surface side of the retainer 122. An airbag attachment member 128 is disposed along the inner peripheral surface of the airbag 126 so as to press the peripheral edge of the opening 134 of the airbag 126, and the airbag 126 has a peripheral edge of the openings 130 a of these retainers 122. The peripheral portion of the opening 134 is sandwiched between the mounting portion 128 and the mounting member 128 so as to be fixed to the retainer 122. The attachment member 128 has a male screw portion 128 a extending rearward. The male screw portion 128 a is inserted into an insertion hole (not shown) provided in the airbag 126 and the retainer 122, and the rear surface of the retainer 122. The nut 128b is fastened from the front end side of the male screw portion 128a protruding to the side, and is fixed to the retainer 122.
[0088]
  A module cover 136 is attached to the front surface portion of the airbag 126. An insertion portion 140 through which one end side of the strap 138 for connecting the module cover 136 and the airbag attachment member 128 is inserted is provided on the back surface of the module cover 136, and is near the center of the front portion of the airbag 126. Is provided with an opening 126 a for conducting the strap 138 into the airbag 126.
[0089]
  A connecting member 142 for connecting the airbag attachment member 128 and the module cover 136 via a strap 138 is installed on the front side of the inflator 124. The connecting member 142 includes a flat plate-like base portion 142 a disposed along the front surface of the inflator 124, and an insertion portion 142 c that protrudes forward from the vicinity of the center of the base portion 142 a and through which the other end side of the strap 138 is inserted. And a convex portion 142b provided with. The front surface of the connecting member 142 is pressed by a connecting member pressing portion 144 that extends from the pressing portion 132 and is provided so as to go around the front surface of the base portion 142a. Thereby, the connecting member 142 is fixed to the airbag attachment member 128 on the front side of the inflator 124.
[0090]
  The strap 138 is configured by a belt-like cloth having strength that does not break or expand when the airbag is inflated, for example, a webbing for a seat belt of an automobile, and one end side of the strap 138 is inserted into the insertion portion 140 of the module cover 138. The air bag 126 is electrically connected to the inside through the opening 126a of the bag 126, and the other end is inserted into the insertion portion 142c of the connecting member 142 inside the airbag 126, and then both ends are connected to each other. It has become. The airbag attachment member 128 and the module cover 136 are connected via the strap 138, so that the module cover 136 is not separated from the airbag attachment member 128 by a predetermined distance or more when the airbag is inflated. ing.
[0091]
  The airbag device 120 is installed on the steering wheel 146 after the airbag 126 is folded and the module cover 136 is disposed on the front surface of the airbag 126 so as to cover the folded body of the airbag 126.
[0092]
  In the airbag device 120 configured as described above, in an emergency such as a vehicle collision, the inflator 124 performs a gas ejection operation, and this gas passes through the gas conduction port 128a provided on the side surface of the airbag mounting member 128. When the air bag 126 is introduced into the air bag 126, the air bag 126 starts to inflate. At this time, the airbag 126 bulges so that the front surface portion pushes the module cover 136 forward. The module cover 136 moves forward by a predetermined distance as the front portion of the airbag 126 bulges, and then the strap 138 is taut and the advancement is stopped. As a result, since the front surface portion of the airbag 126 arranged on the rear surface side of the module cover 136 is prevented from being expanded forward by the module cover 136, both side portions of the airbag 126 whose expansion is not restricted. Due to the gas pressure, the air bag 126 expands largely to the side, and the airbag 126 is deployed over a wide range to the outside of the steering wheel.
[0093]
  As described above, in the airbag device 120, since the airbag 138 is restrained from being inflated forward by the strap 138 in the initial stage of inflation of the airbag, the gas pressure from the inflator 124 is exclusively in the airbag 126. Expended for lateral deployment. Therefore, since the airbag 126 is deployed over a wide range to the outside of the steering wheel 146 and is sufficiently interposed between the occupant and the steering wheel 146, the occupant can be reliably protected.
[0094]
  In addition, thisReference exampleIn the above, the module cover and the airbag mounting member are connected by a single strap, but the number of straps or the method of connecting the strap, the module cover and the airbag mounting member is not limited to the above-described configuration. . For example, as shown in FIG. 15, in the airbag device 150, the airbag mounting member 152 and the module cover 154 are connected by two loop-shaped straps 156 and 158.
[0095]
  Like the airbag device described above, the airbag device 150 includes a retainer 160, an inflator 164 accommodated in the accommodating portion 162 of the retainer 160, and a front surface of the inflator 164 wrapping around the front side of the inflator 164. And an airbag 168 fixed to the retainer 160 by the airbag attachment member 152. A module cover 154 is attached to the front surface of the airbag 168. The presser portion 166 extends so as to cover the front surface of the inflator 164.
[0096]
  Four insertion portions 170, 172, 174, and 176 through which straps 156 and 158 for connecting the module cover 154 and the airbag attachment member 152 are inserted are provided on the rear surface of the module cover 154. As shown in FIG. 18, these insertion portions 170, 172, 174, and 176 are arranged so that the insertion portion 170 and the insertion portion 174 face each other, and the insertion portion 172 and the insertion portion 176 face each other. Openings 178, 180, 182 and 184 for conducting the straps 156 and 158 into the airbag 168 are provided at positions where the airbag 168 overlaps with the insertion portions 170 to 176, respectively.
[0097]
  As shown in FIG. 17, a strap conducting portion 186 made up of a substantially cross-shaped bulging portion is provided on the front surface portion of the pressing portion 166 of the airbag mounting member 152. Openings 186a, 186b, 186c, and 186d communicating with each other are provided at the four ends of the strap conducting portion 186 extending in a substantially cross shape.
[0098]
  The straps 156, 158Reference exampleIn the same manner, it is composed of a webbing for a seat belt of an automobile and the like. One end of the strap 156 is inserted into the insertion portion 170, and then inserted into the opening 178 of the airbag 168, and is pulled into the strap conduction portion 186 from the opening 186 a inside the airbag 168. On the other hand, the other end side of the strap 156 is drawn into the airbag 168 through the opening 186 c facing the opening 186 a through the strap conducting portion 186, and the airbag is opened from the opening 182 disposed on the opposite side of the opening 178 of the airbag 168. After being pulled out, the module cover 154 is inserted into the insertion portion 174 facing the insertion portion 170. Next, both ends of the strap 156 are connected to each other, and the strap 156 is configured in a loop shape to connect the module cover 154 and the airbag attaching member 152. Similarly to the strap 156, the strap 158 is inserted into the strap conducting portion 186 through openings 186 b and 186 d facing each other inside the airbag 168, and both ends are pulled out from the openings 180 and 184 of the airbag 168, respectively. Thus, the module cover 154 is inserted into the insertion portions 172 and 176 of the module cover 154 and is configured in a loop shape to connect the module cover 154 and the airbag attachment member 152.
[0099]
  The airbag device 150 is installed on a steering wheel 190 of an automobile after the airbag 168 is folded and a module cover 154 is disposed so as to cover the airbag 168.
[0100]
  Also in the airbag device 150, since the module cover 154 and the airbag mounting member 152 are connected by the straps 156 and 158 similarly to the airbag device 120 described above, the airbag 168 moves forward in the initial stage of inflation. Bulge is regulated. Since the gas pressure from the strap is consumed exclusively for the lateral deployment of the airbag 168, the airbag 168 is deployed over a wide area to the outside of the steering wheel 190, and between the occupant and the steering wheel 190. It is very well interposed and can reliably protect the occupant.
[0101]
  In the airbag device 150, the module cover 154 and the airbag mounting member 152 are connected by two loop-shaped straps 156 and 158. Therefore, when the airbag is inflated, for example, an inflator having a large output is used. Even if it is used, the advancement of the module cover can be reliably stopped.
[0102]
  In addition, theseReference exampleThe strap regulates the forward expansion of the airbag by connecting the module cover and the airbag mounting member, but is not limited to this. For example, instead of the module cover, an emblem and The airbag mounting member may be connected, or the inner peripheral surface side of the front portion of the airbag and the airbag mounting member may be coupled to directly restrict the inflation of the airbag toward the front side. Also good.
[0103]
  In the above-described embodiment, the inflator has a substantially cylindrical shape having a flat side surface, the latter half side is accommodated in the retainer accommodating portion, and the gas ejection portion on the front half side is the pressing portion of the airbag mounting member. The front surface is pressed by an inward hook-shaped portion and is fixed to the retainer, but the shape of the inflator and the configuration of the retainer receiving portion and the holding portion of the airbag mounting member are as follows. It is not limited to this.
[0104]
  In the present invention, when the emblem 136E is provided like the module cover 136M of FIG. 23, the emblem 136E may be provided with the insertion portion 140M, and the strap 138 may be passed through the insertion portion 140M.
[0105]
  Hereinafter, other configurations of the retainer accommodating portion and the airbag attaching member pressing portion will be described with reference to FIGS. FIG. 19 shows another configuration of the retaining portion of the retainer and the pressing portion of the airbag mounting member., According to the reference exampleFIG. 20 is a sectional view of an essential part of the airbag device, and FIG. 20 shows still another structure of the retainer accommodating portion and the airbag attaching member pressing portion., According to the reference exampleIt is principal part sectional drawing of an airbag apparatus.
[0106]
  As shown in FIG. 19, the airbag apparatus 200 includes an inflator 202 having a large-diameter portion 202a having a gas generating portion on the rear half side and a small-diameter portion 202b having a gas jetting portion on the front half side. Yes. The upper surface of the large diameter portion 202a of the inflator 202 is a shoulder portion 202c that is continuous with the rear end portion of the small diameter portion 202b. The airbag device 202 does not have an attachment piece to a retainer 204 described later.
[0107]
  In the vicinity of the center of the retainer 204, an accommodating portion 206 is provided for accommodating substantially the entire large diameter portion 202a of the inflator 202. An airbag 208 is arranged on the front side of the retainer 204. An inflator opening 208 a is provided at the rear end portion of the airbag 208, and the peripheral portion of the opening 208 a of the airbag 208 and the peripheral portion of the accommodating portion 206 of the retainer 204 are overlapped on the front side of the retainer 204. Yes.
[0108]
  An airbag attachment member 210 is disposed along the inner peripheral surface of the airbag 208 so as to press the peripheral edge of the opening 208 a of the airbag 208. The airbag attachment member 210 has a substantially disk shape having an opening 210a through which the small diameter portion 204b of the inflator 204 is inserted in the center. The peripheral portion of the opening 210a is formed by the airbag attachment member 210. A pressing portion 212 that extends to the front surface of the shoulder portion 202c of the inflator 202 and presses the front surface of the shoulder portion 202c when arranged at the peripheral edge portion of the opening 208a of the bag 208.
[0109]
  Thus, in this airbag apparatus 200, when the inflator 202 which has the large diameter part 202a provided with the gas generation part in the second half side and has the small diameter part which consists of the gas ejection part in the first half side is used. Even so, the retainer 204 is provided with an accommodating portion 206 that accommodates substantially the entire large-diameter portion 202a of the inflator 202, and the airbag mounting member 210 has an opening 210a through which the small-diameter portion 202b of the inflator 202 is inserted. In addition, the retainer can be firmly retained by using a substantially disc shape in which the peripheral edge portion of the opening 210a extends to the front surface of the shoulder portion 202c of the inflator 202 and serves as a pressing portion 212 that presses the front surface of the shoulder portion 202c. Inflator 202 can be fixed to 204.
[0110]
  20 includes an inflator 222 having a flat side surface and a retainer 224 formed in a substantially flat plate shape. The rear end of the inflator 222 is located near the center of the retainer 224. An insertion hole 224a through which the connector pulled out from the section is inserted is provided. The inflator 222 is disposed so that the connector is inserted into the insertion hole 224a and the rear surface thereof overlaps with the peripheral portion of the insertion hole 224a on the front surface side of the retainer 224. The airbag device 220 includes an airbag 226 and an airbag attachment member 228 for attaching the airbag 226 to the retainer 224.
[0111]
  The rear end portion of the airbag 226 and the airbag attachment member 228 are provided with inflator openings 226a and 228a, respectively. In the airbag 226, the inflator 222 is inserted into the opening 226a, and the peripheral portion of the opening 226a is overlapped with the peripheral portion of the inflator 222 on the front surface side of the retainer 224.
[0112]
  The airbag attachment member 228 includes a substantially cylindrical peripheral wall portion 230a extending forward from the edge of the opening 228a and extending along the side surface of the inflator 222, and an inflator extending from the distal end portion of the peripheral wall portion 230a. A presser portion 230 is provided that includes an inward hook-shaped portion 230 b that extends around the front surface of 222 and presses the front surface of the inflator 222.
[0113]
  The airbag attachment member 228 is disposed along the inner peripheral surface of the airbag 226 so that the inflator 222 is inserted from the opening 228a and the peripheral portion of the opening 228a presses the peripheral portion of the opening 226a of the airbag 226. . The airbag 226 and the airbag attachment member 228 are fixed to the retainer 224 with bolts and nuts or the like.
[0114]
  The inflator 222 extends along the side surface thereof, wraps around the front surface side thereof, and is fixed to the retainer 224 by a pressing portion 230 that holds the front surface.
[0115]
  As described above, in the airbag device 220, the inflator 222 can be firmly fixed to the retainer 224 only by the pressing portion 230 of the airbag attachment member 228 without providing the retainer 224 with an inflator accommodating portion.
[0116]
  In the above embodiment, the airbag mounting member includes a pressing portion that presses the front surface of the inflator, and the pressing portion extends from the edge of the inflator opening provided on the airbag mounting member. It is comprised from the substantially cylindrical surrounding wall part extended ahead so that it may extend along a side surface, and the inward hook-shaped part provided so that it might go around from the front-end | tip part of this surrounding wall part to the front surface of an inflator However, the structure of the presser portion is not limited to this. Below, with reference to FIG. 21, 22, the other structure of a holding | suppressing part is demonstrated. In each of FIGS. 21 and 22, (a) is a perspective view of an airbag mounting member provided with a holding portion of another configuration, (b) is a top view of the airbag mounting member of FIG. (C) And (d) figure is a top view of the airbag attachment member which shows the modification of the pressing part of (a) figure.
[0117]
  The airbag attachment member 250 shown in FIG. 21 has an inflator opening 250a and a front edge extending from the edge of the opening 250a and the front end thereof wraps around the front side of the inflator (not shown). And a presser portion 252 formed in a substantially inverted L-shaped hook shape that is bent so as to press the front surface.
[0118]
  A plurality of the pressing portions 252 are provided at positions that equally divide the opening 250a. For example, in FIGS. 21 (a) and 21 (b), the airbag attachment member 250 has four pressing portions 252, and these pressing portions 252 are arranged at positions that divide the opening 250a into four equal parts. . Also, in FIGS. 21 (c) and 21 (d), the airbag attachment member 250 has three and two pressing portions 252 respectively, and these pressing portions 252 divide the opening 252a into three equal parts. And it arrange | positions in the position which bisects.
[0119]
  An airbag attachment member 260 shown in FIG. 22 has an inflator opening 260a, and a plurality of leg portions 262a extending forward from the edge of the opening 260a around the opening 260a. In addition, there is provided a holding portion 262 that includes a bridge-like portion 262b that connects the tip portions of the leg-like portions 262a to each other and goes around the front surface of the inflator to hold the front surface of the inflator.
[0120]
  The leg portions 262a of the presser portion 262 extend from positions where the openings 260a are equally divided. For example, in FIGS. 22 (a) and 22 (b), the airbag mounting member 260 has four leg portions 262a extending from the edge of the opening 260a, and these leg portions 262a are open. It is arranged at a position that divides 260a into four equal parts. 21 (c) and 21 (d), the airbag attachment member 260 has three and two leg-like portions 262a extending from the edge of the opening 260a, respectively. The shape portion 262a is disposed at a position that divides the opening 252a into three equal parts and two equal parts.
[0121]
  Even in the airbag mounting members 250 and 260 configured as described above, the presser portions 252 and 262 wrap around the front surface of the inflator and press the front surface of the inflator, so that the inflator can be firmly fixed to the retainer. .
[0122]
【The invention's effect】
  As described above in detail, according to the airbag device of the present invention, the inflator is configured to be fixed to the retainer by the airbag mounting member, so that even when the inflator having no attachment piece to the retainer is used. The inflator can be securely fixed to the retainer. Thereby, the trouble of providing the inflator with the attachment piece to the retainer can be saved and the cost can be reduced.
[0123]
  In the airbag device of the present invention, a switch can be arranged between the front surface of the inflator and the module cover, and the switch can be supported by the airbag mounting member. It can be made excellent in properties. Furthermore, the front part of the airbag or the module cover or emblem and the airbag mounting member are connected by a strap, and the airbag is restrained from being bulged forward in the initial stage of airbag deployment. The side portion can be greatly expanded to the outside of the steering wheel, and the airbag can be sufficiently interposed between the occupant and the steering wheel.
[Brief description of the drawings]
[Figure 1]Reference exampleIt is sectional drawing of the principal part of the airbag apparatus which concerns on this.
2 is an exploded perspective view showing a configuration of a main part of the airbag apparatus of FIG. 1. FIG.
FIG. 3The fruitIt is sectional drawing which shows the structure of the principal part of the airbag apparatus which concerns on embodiment.
[Fig. 4]Reference exampleIt is a disassembled perspective view which shows the structure of the principal part of the airbag apparatus which concerns on this.
FIG. 5 is a cross-sectional view showing a configuration of a main part of the airbag device of FIG. 4;
6 is an enlarged view of a VI portion in FIG. 5. FIG.
[Fig. 7]Reference exampleIt is a disassembled perspective view which shows the structure of the principal part of the airbag apparatus which concerns on this.
[Fig. 8]Reference exampleIt is a disassembled perspective view which shows the structure of the principal part of the airbag apparatus which concerns on this.
FIG. 9Reference exampleIt is a disassembled perspective view from the back which shows the structure of the principal part of the airbag apparatus which concerns on this.
FIG. 10Reference exampleIt is sectional drawing which shows the structure of the principal part of the airbag apparatus which concerns on this.
11 is a cross-sectional view of the main part showing a modification of the airbag device of FIG. 10. FIG.
FIG.Reference exampleIt is sectional drawing at the time of airbag expansion | swelling of the airbag apparatus which concerns on this.
13 is a perspective view of the airbag of the airbag device of FIG. 12. FIG.
FIG. 14 is an enlarged perspective view of a main part of the airbag device shown in FIG.
FIG. 15Reference exampleIt is sectional drawing at the time of airbag expansion | swelling of the airbag apparatus which concerns on this.
16 is a perspective view of the airbag of the airbag apparatus of FIG. 15. FIG.
FIG. 17 is a perspective view of an airbag attachment member of the airbag device of FIG. 15.
FIG. 18 is a perspective view from the rear surface of the module cover of the airbag device of FIG. 15.
FIG. 19Reference exampleIt is sectional drawing which shows the structure of the principal part of the airbag apparatus which concerns on this.
FIG. 20Reference exampleIt is sectional drawing which shows the structure of the principal part of the airbag apparatus which concerns on this.
FIG. 21 is an explanatory view showing a modified example of the airbag attachment member of the airbag apparatus of the present invention.
FIG. 22 is an explanatory view showing a modification of the airbag attachment member of the airbag apparatus of the present invention.
FIG. 23DAbagSetIt is explanatory drawing which shows a modification.
[Explanation of symbols]
  1,30,50,90,120,150,200,220 Airbag device
  2,32,52,82,92,122,204,224 Retainer
  4,54,80,94,124,164,202,222 Inflator
  6,56,96,126,168,208,226 Airbag
  8, 58, 86, 98, 128, 152, 210, 228, 250, 260 Airbag mounting member
  14, 60, 84, 100, 130, 162, 206 accommodating part
  20, 72, 88, 102, 132, 166, 212, 230, 252, 262
  34 Housing member

Claims (9)

  1. A base member;
    An airbag attached to the base member by an airbag attachment member;
    An inflator that generates gas for inflating the airbag;
    An airbag device having a module cover that covers the folded airbag,
    The inflator is of substantially cylindrical shape, and than potato such has an attachment piece that protrudes from the side peripheral surface,
    The inflator is an airbag device fixed to the base member by the airbag mounting member ,
    The base member is provided with an inflator insertion opening;
    The airbag is disposed on the occupant side of the base member, and an inflator receiving opening is provided at an end opposite to the occupant of the airbag, and a peripheral portion of the inflator receiving opening is the base member Is overlapped with a peripheral edge of the inflator insertion opening and fixed by the airbag attachment member,
    An accommodation member for accommodating the inflator protruding from the base member to the opposite side of the occupant is attached to the base member,
    The housing member is configured separately from the base member and attached to the base member,
    The housing member is
    A substantially cylindrical peripheral wall disposed coaxially with the inflator insertion opening;
    An outward hook-like portion extending outward from the end of the peripheral wall portion on the passenger side,
    An inward saddle-like portion extending from the opposite side of the peripheral wall portion to the occupant inside the peripheral wall portion;
    With
    The outward flange-like portion is overlapped with the peripheral portion of the inflator insertion opening of the base member from the side opposite to the occupant of the base member and fixed to the base member,
    The inflator is inserted into the inflator insertion opening with the axial direction parallel to the axial direction of the inflator insertion opening, and the opposite side of the inflator is accommodated inside the peripheral wall of the accommodation member. And the occupant side is introduced into the airbag through the inflator receiving opening,
    The occupant side of the inflator is a gas ejection part,
    The airbag mounting member has a presser part that goes around the occupant side of the inflator and presses the inflator,
    The inflator is fixed to the base member by being supported by the peripheral wall portion and the inward hook-like portion of the housing member on the side opposite to the occupant and being pressed by the presser portion from the occupant side. An airbag device.
  2. 2. The airbag mounting member according to claim 1, wherein the airbag attachment member has an inflator insertion opening, and is an annular member that overlaps with a peripheral edge portion of the inflator receiving opening from the inside of the airbag, and the peripheral edge of the inflator insertion opening There is a male thread part that extends from the part to the opposite side of the occupant,
    The male screw portion is inserted into a peripheral portion of the inflator receiving opening of the airbag, a peripheral portion of the inflator insertion opening of the base member, and an insertion hole provided in the outward flange-like portion of the housing member. The air bag, the air bag mounting member, and the housing member are fixed to the base member by tightening a nut into the male screw portion from the side opposite to the occupant of the outward flanged portion. Air bag device.
  3. The presser portion according to claim 2, wherein the presser portion includes a substantially cylindrical peripheral wall portion extending from a side edge portion of the inflator insertion opening of the airbag mounting member toward an occupant side, and an end portion on the occupant side of the peripheral wall portion. An inward hook-shaped portion extending inside the peripheral wall portion,
    The airbag device characterized in that the inward saddle-shaped portion wraps around the occupant side of the inflator and presses the inflator.
  4. 3. The presser part according to claim 2, wherein the presser part extends from a side edge part of the inflator insertion opening of the airbag mounting member toward the occupant side, and a distal end part in the extending direction wraps around the occupant side of the inflator. An airbag device characterized in that the airbag device is bent and hooked to hold the inflator from the passenger side.
  5. 3. The presser part according to claim 2, wherein the presser part includes a plurality of leg-like parts extending from a side edge part of the inflator insertion opening of the airbag attachment member toward an occupant side, and a distal end of the leg-like part in the extending direction. It has a bridge-like part connecting the parts,
    The airbag apparatus characterized in that the bridging portion wraps around the occupant side of the inflator and presses the inflator.
  6. In any one of Claims 1 thru | or 5, this airbag apparatus is provided with the positioning means for preventing rotation and a shift | offset | difference of the said inflator,
    The positioning means includes an opening or a bulging portion provided in the pressing portion or the housing member, and a convex portion provided in the inflator, and the opening or the bulging portion and the convex shape portion. The airbag device is engaged so that it cannot rotate and swing.
  7. In any one of claims 1 to 6, wherein arranged switch between the occupant-side surface and the module occupant side surface portion of the cover of the inflator, the switch is supported by the pressing portion of the airbag attachment member An airbag device characterized by comprising:
  8. In any one of claims 1 to 7, an airbag apparatus characterized by the occupant side surface of the airbag mounting member and the airbag are connected via a strap.
  9. In any one of claims 1 to 7, wherein and the module cover or emblem attached to the occupant side surface of the airbag, that the said module cover or the emblem and the airbag attachment member is connected by a strap An airbag device characterized by the above.
JP2000121333A 2000-04-21 2000-04-21 Airbag device Active JP4560881B2 (en)

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US09/835,850 US6409209B2 (en) 2000-04-21 2001-04-17 Airbag apparatus

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US6409209B2 (en) 2002-06-25
JP2001301560A (en) 2001-10-31
US20010035632A1 (en) 2001-11-01

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